The Iterated Function Systems (IFS) model has been popularized by Barnsley as a useful method for generating self-similar fractals. This article introduces a package for modeling and generating IFS fractal images using the chaos game algorithm. The efficiency of the rendering process is analyzed, giving the most efficient set of probabilities to render the fractal attractor associated with an IFS. A gallery of fractals with several classical examples is provided to illustrate the use of the package.